HardLabs

01-MAIN

tuton-RCJ·2025PCB·3-NAGOYA/01-MAIN/01-MAIN.kicad_pcb

01-MAIN PCB layout, top view — open source STM32 board by tuton-RCJ

About the 01-MAIN PCB

01-MAIN is an open source STM32 PCB design by tuton-RCJ, published on GitHub under the MIT license. It is a 2-layer board measuring 130 × 146 mm, with 68 components from 33 distinct parts.

Its main chip is the STM32F446RETX, from the STM32 family. Other key parts include the MAX485ESA, CH340E and TPS5430DDA. By type, the board carries 19 capacitors, 18 resistors, 8 ICs, 8 connectors, 8 diodes and 3 inductors.

From the project

基板・回路のリポジトリです。

基板はすべてKiCAD7.0で設計し、JLCPCB様に発注しています。 1-TOKYOが東東京ノード大会で使用した基板です。 2-KANTOは関東ブロック大会で使用した基板です。 3-NAGOYAは名古屋全国大会で使用した基板です。

Main components on the 01-MAIN

STM32F446RETXMAX485ESACH340ETPS5430DDA

01-MAIN bill of materials (BOM)

68 components, 33 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
STM32F446RETX
STM32F446RETx
U1
1
MAX485ESA
U2
2
~
U3, U5
1
~
U4
1
CH340E
U6
2
TPS5430DDA
U7, U8
1
2SA1015
Q1
1
Front
J1
1
Top
J2
1
toLINE
J3
1
USB_C_RECEPTACLE_USB2.0
USB_C_Receptacle_USB2.0
J4
4
STS3032
J5, J6, J7, J8
1
Buzzer
BZ1
1
NRST
SW1
1
BOOT0
SW2
5
C2297
LED_GREEN
D1, D2, D3, D7, D8
1
C2296
LED_ORANGE
D4
2
SS34
D5, D6
1
C1015
FerriteBead
FB1
2
22U
22u
L1, L2
Show 13 more
QtyPartRefs
10
100N
100n
C1, C3, C4, C5, C6, C8, C9, C10 +2
2
4.7U
4.7u
C2, C7
1
1u
C11
2
10U
10u
C14, C15
2
0.01U
0.01u
C16, C17
2
220U
220u
C18, C19
1
7.5K
7.5k
R1
4
10K
10k
R2, R6, R13, R15
1
20K
20k
R3
4
2.2K
2.2k
R4, R5, R14, R16
5
470
R7, R10, R12, R17, R18
1
1k
R8
2
5.1K
5.1k
R9, R11

01-MAIN design files

The KiCad project lives in the tuton-RCJ/2025PCB repository on GitHub; these links point at the commit this page was built from.

01-MAIN: common questions

What microcontroller does the 01-MAIN use?

The 01-MAIN is built around the STM32F446RETX, from the STM32 family.

How big is the 01-MAIN PCB?

The 01-MAIN measures 130 × 146 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the 01-MAIN?

68 components, from 33 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the 01-MAIN design files?

From the tuton-RCJ/2025PCB repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the 01-MAIN design in my own project?

Yes, under the terms of its MIT license, which tuton-RCJ chose for the repository.

Can I test firmware for the 01-MAIN without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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Earlier revisions in the repo: 01-main

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